Vibrator mechanism



Patented Sept. 6, 1932 UNITED STATES PATENT OFFICE Application filedJanuary 87, 1882. Serial Io. 589,289.

5 unset concrete, the vibrators being attached to the forms into whichthe concrete is poured or, in the case of concrete roads, to platformsresting on the top of the poured concrete. For such and other uses ofvi- 10 brating mechanism it is desirable that the motor actuating thevibrator should be supported on the vibrator housing or partsimmediately connected therewith but as heretofore constructed, mechanismof this kind 15 has involved the energetic vibration of the motorhousing and motor parts, which for obvious reasons is undesirable andfrequently results in such injur to the motor mechanism as to put it out0 operation.

Again, it is frequently desirable that the object to be vibrated shouldhave attached to it a pluralitv of vibrators acting on the same form, weor latform but where a plurality of vibrators as been so used it has eenfound that at times the vibrations imparted to the wall or platform willbe at times deadened, this bein as I have found, due to the fact thatthe vibrations of the vibrators are out of time, that is, do not occurat the same time in the same direction and under such conditions thevibrations imparted by one vibrator are to a certain extent nullified bythe vibrations imparted by another vibrator.

Having particularly the above stated facts in view,'the objects of myinvention are, in the first place, to provide means for su porting amotor on the housing of a vibrator which, while providing for the propersupport and positioning of the motor and its parts with respect to thevibrator, will at the same time prevent or greatly reduce the tendencyof the supporting vibrator housing to im art its vibratory movements tothe motor which it supports. A second primary object which I have inview is to provide means for synchronizing the vibratory movements of aplurality o vibrators attached to the same object so that theirvibratory movements will be imparted to the object at all times in thesame direction, thus avoiding the liability of the one vibrator tonullify or impair the vibrations imparted by another vibrator. Otherobjects which I have in view are to provide appropriate and serviceabledetails of construction in a paratus designed to embody the primaryeature of my invention. Vibrators of the typical-kind to which myinvention relates generally consists of a vibrator housing adapted to besecured to the wall or platform to be vibrated and supporting a drivenshaft to which is attached an eccentric weight, which when the shaft israpidly rotated, imparts an energetic vibration to the housing and theobject connected thereto. The motor which actuates the vibrator may beof any convenient kind, involving and actuating a drivin shaft, themotor and shaft being supported in a suitable housing, which in turnmust be so supported as to support the driving shaft in approximatealignment with the driven shaft of the vibrator and my invention,broadly speaking, consists in providing as a support for the motorhousin a laterally resilient supporting device secure to the vibratorhousin at one endand to the motor housing at its 0 or end, thesupporting devices being of such rigidity as will norma y support themotor in correct alignment with the vibrator, while at the same time ithas such lateral resilience as will enable it to yield to the vibratorymovements of the vibrator housing without imparting these vibratorymovements to the supporte motor housing or at least to efiect a verymaterial reduction to the vibratory influence which would be imparted tothe motor housing if it were rigidly connected to the vibrator housing.Any supporting device having suflicient lateral resilience to permit thevibrator housing to which it is attached to vibrate withoutcommunicating its vibrations to the motor housing which it supports orto communicate these vibrations with greatly reduced amplitude may beused but preferably I emp 0y as a motor support a heavy hose-likestructure of fabric and rubber secured at its ends to the'housings ofthe vi rator and motor and by preference so located as to encase andform a shield for the ends of the motor shaft and the shaft of thevibrator and for the flexible connection or coupling by which the motorshaft is connected to the vibrator shaft.

By preference I make the motor and vibrator shafts hollow and with aninternal taper expanding toward the opposed ends of the shafts and Icouple the shafts together by a flexible shaft extendin through thehollow shafts and secured to t cm at their outer ends and by preferencealso I provide means for stiffening the intermediate part of theflexible shaft so as to obviate the tendency of such a shaft to whip.

Where a plurality of vibrators are attached to the object to bevibrated, my invention consists in so locating the eccentric weightssecured to the shafts of the vibrators that they will extend from theshafts in the same angular direction and then connecting the shafts ofthe motor and vibrators in tandem in such manner that they will rotatein synchronism with each other sothat the impulses imparted to thehousings and through them to the object to be vibrated will always be inthe same direction instead of in opposite directions. For the betterunderstanding of my improvements reference should be had to the drawingwhich illustrates vibrator mechanism embodying my improvements and inwhich Fi re 1 is an elevation showing a motor and t ree vibratorsconnected in tandem, the motor being shown as supported by the housingof one of the vibrators through a laterally resilient support, and

Figure 2 is a sectional elevation through the motor housing and throughthe housing of the vibrator which supports the motor, the elevationbeing on a vertical plane passing through the centers of the driving anddriven shafts.

A indicates a housing of the vibrator which supports the motor. A and A,Fig. 1, indicate the housin of additional vibrators connected in tan emwith a motor driving shaft and the shaft of the vibrator A. As shown,these vibratorsere provided with extensions B by which they can beconveniently secured to the object or objects to be vibrated. Cindicates a latform to which the vibrators are secured t rough theirextensions B.

The vibrator housin A has secured within it bearin (ball bearings, asshown) indicated at These bearings support a shaft E, having extendinfrom one side of it an eccentric weight, in icated at E The shaft E ispreferabl made hollow with a ta ering bore, indicate at E, the boreexten ing in the direction of the attached motor and at its opposite endthe bore is enlarged, as indicated at E, this enlarged portion of thebore being externally threaded. The shaft and bearings are inserted inthe housing through an open end a, which is closed by 8.

head or cover, indicated at F and, as shown, is formed with a centralopenin indicated at F to give passage to a stub s aft, to be described.At the opposite end of the housing an opening a is provided to givepassage to the end of the shaft E. G is an annular rim extending fromthe end of the housing A and formed concentric with the shaft opening a.This rim is preferably formed with annular groovesGr on its outersurface.

H is a motor housing. This house encloses a motor, conveniently anelectric motor, diagrammatically indicated at I, a shaft J actuated bythe motor and constituting the driving shaft of the apparatus, the saidshaft being supported in bearings, indicated at K, K. This shaft, likethe shaft of the vibrator, is made with a tapering bore, indicated at Jand at its outer end the bore is enlarged to form a seat J thisenlargement being externally threaded. The motor housing, as shown, isopen at both ends, the openings being covered by caps or cover plates,indicated at L, L. The cover L is formed with an opening L through whichthe end of the shaft J extends and the cover L is also formed with anopening, indicated at L, for the passa e of a stub shaft. An annular rimM exten s from the housing of the motor, so located as to silrround and,as shown, he concentric with the end of the motor shaft J, the outersurface of this rim being provided with annular ooves, as indicated. Inthe construction illustrated the laterally resilient motor supportconsists of a hose-like section N, conveniently made up of rubber andfabric, as is an ordinary hose and secured to the annular rims G and Mby passing over these rims and being clamped down upon them b clampingrings, indicated at O and O. This hose or other equivalent supportingstructure must be sufficiently stiff to support the motor in roperalignment with the vibrator shaft, w ile at the same time it issufliciently laterally resilient to permit the vibrator housing tovibrate without communicating its vibratory motion to the su portedmotor housing or at least without e ecting a corresponding vibration tothe-motor housing. I

While any convenient flexible coupling may be used to connect thedriving shaft of the motor with the driven shaft of the vibrator, Iprefer the construction indicated in Fig. 2, in which the two shafts arecoupled by a hollow flexible shaft preferably made up of fabric andrubber and indicated at P. This hollow shaft extends through the taperedbores of the driving and driven shafts and is secured in the seats E andJ by plu Q, Q, which screw onto the threaded en s of the shafts E and Jand are formed with conical plugs Q, Q, which are thrust into the endsof the hollow flexible shaft so as to expand these ends and force themagainst the seats E and of the flexible shaft P should be stiffened andfor this pur while any stifienin means maybe emp oyed, I have indicatedt e location in the hollow flexible shaft of a stiifening metalcylinder, indicated at R, this stiffening cylinder, as shown, beinglocated in the portion of the flexible shaft which lies between the endsof the driving and driven shafts.

While any convenient means may be used for coupling additional vibratorsin tandem with the vibrator A, I have, in the construction illustrated,provided stub shafts S and S extending from the backs of the plugs Q andQ, throu h the openin indicated at F and L. To t ese stub sha additionalvibrator shafts can be connected by any flexible couplings, as indicatedb flexible shafts indicated at T and T shown, the flexible shafts areclamped on to the ends of the stub shafts by, bands U.

It will be understood that when the vibrator housing A and the motorhousing H are coupled by the laterally resilient motor support N, themotor is supportedwith its driving shaft in approximate alignment withthe shaft of the vibrator and that the driving and driven shafts areconnected by a flexible cou ling, preferably as shown, by the flexiblesha t P. When the motor is set in operation this flexible shaftcommunicates the motion of the driving shaft of the motor to the drivenshaft of the vibrator, which is set in rapid rotation, so that itseceentricall located weight E imparts to the vibrator ousing a rapidvibratory motion, which is communicated to the connected object to bevibrated, as shown the platform C. It will also be obvious at bysupporting the motor from the vibrator housing on a laterally resilientsup rt, as shown, the hose coupling N, the rapid vibrations of the motorhousing may and to a larg extent will be taken up in the laterally resi'ent support and thereby be prevented from imparting to the motor thevibrations of the vibrator housing or at least with the effect of sodeadening these vibrations as not to have a destructive effect upon themotor. The flexible coupling uniting the shafts of the motor and virator enables the motor to drive the vibrator shaft notwithstanding thevibratory motion of this shaft, while the stiffening of the flexibleshaft, preferably used as a coupling for the shafts, obviates suchtendency as may exist to impart a whipping action to this shaft.

Where it is desired, as indicated in Fig. 1, to use a plurality ofvibrators it is, as I have stated, important that these vibrators shouldvibrate in unison so as to im art their vibratorv action to the objectto w ich they are attached in roperly timed relation and this is readilye ected by coupling the motor and vibrators, as indicated in Fig. 1,seeing to it that the eccentric weights attached to the vibrator shaftsextend from the shafts in the same direction.

Having now described my invention, what I claim as new and desire tosecure by Letters Patent, is:

1. Vibrator mechanism comprising in combination a vibrator housinadapted to be secured to the object to be vibrated supporting a drivenshaft and an eccentric weight rotating with said shaft, a laterallyresilient motor support secured to the vibrator housing and supporting amotor housing, a motor housing supported on said laterally resilientsupport and supporting a motor and a driving shaft in such manner thatthe drivin shaft will be in approximate alignment with the driven shaftof the vibrator and a flexible coupling between the driving and drivenshafts.

2. Vibrator mechanism as called for in claim 1, in which the motor suport consists of a hose-like structure secure at its ends to the vibratorand motor housing and surrounding the o posed ends of the driving anddriven sha s and the flexible coupling uniting them.

3. Vibrator mechanism as called for in claim 1, in which the driving anddriven shafts are made hollow, the hollow portions of the opposed endsof the shafts being tapered and the flexible connection consists of aflexible shaft extending through and between the ta ered portions of thedriving and driven s afts, said flexible shaft being secured at theouter ends of said shafts.

4. Vibrator mechanism as called for in claim 1, in which the driving anddriven shafts are made hollow, the hollow portions of the opposed endsof the shafts being tared and the flexible connection consists of aexible shaft extending through and between the tapered portions of thedriving and driven shafts, said flexible shaft bein secured at the outerends of said shafts an being provided with means for stiffening anintermediate portion of its length.

5. Vibrator mechanism comprising a unitary member to be vibrated aplurality of vibrator housings secured to such unitary member and eachsuppbrting a shaft with an eccentric weight secured thereto, saidweights extending from their respective shafts in the same angulardirection and said shafts being set in approximately tandem alignmentwith each other, flexible couplings connecting the shafts of thevibrators so that they will rotate in synchronism witheach other andmeans for imparting rotative motion to said coupled shafts.

6. Vibrator mechanism comprising a unitary member to be vibrated aplurality of vibrator housings secured to such unita member and eachsupportin a shaft wit an eccentric weight secu thereto, said unison.

ROBERT W. BAILY.

DISCLAIMER 1,876,271.Robert W, Baily, Philadelphia, Pa. VIBRATORMECHANISM. Patent dated September 6, 1932. Disclaimer filed January 8,1936, by the patentee.

Hereby directs this disclaimer to that part of the claims in said patentwhich are in the following words, to wit:

5. Vibrator mechanism comprising a unitary member to be vibrated, apluralit of vibrator housings secured to such unitary member and eachsupporting a sha with an eccentric weight secured thereto, said weightsextending from their respective shafts in the same angular direction andsaid shafts being set'in approximately tandem alignment with each other,flexible couplings connecting the shafts of the vibrators so that theywill rotate in synchronism wlth each other and means for impartingrotative motion to said coupled shafts.

6. Vibrator mechanism comprising a unitary member to be vibrated, apluralit of vibrator housings secured to such unit member and eachsupporting a sha t with an eccentric weight secured thereto, sa ii dweights extending from their respective shafts in the same angulardirection, in combination with a motor actuated driving shaft andflexible couplings connecting the shafts of the motor and vibrators intandem so that all so connected shafts will rotate in angular unison.

[Qfl'ic'ial Gazette Febmary 4, 1.936.]

unison.

ROBERT W. BAILY.

DISCLAIMER 1,876,271.Robert W, Baily, Philadelphia, Pa. VIBRATORMECHANISM. Patent dated September 6, 1932. Disclaimer filed January 8,1936, by the patentee.

Hereby directs this disclaimer to that part of the claims in said patentwhich are in the following words, to wit:

5. Vibrator mechanism comprising a unitary member to be vibrated, apluralit of vibrator housings secured to such unitary member and eachsupporting a sha with an eccentric weight secured thereto, said weightsextending from their respective shafts in the same angular direction andsaid shafts being set'in approximately tandem alignment with each other,flexible couplings connecting the shafts of the vibrators so that theywill rotate in synchronism wlth each other and means for impartingrotative motion to said coupled shafts.

6. Vibrator mechanism comprising a unitary member to be vibrated, apluralit of vibrator housings secured to such unit member and eachsupporting a sha t with an eccentric weight secured thereto, sa ii dweights extending from their respective shafts in the same angulardirection, in combination with a motor actuated driving shaft andflexible couplings connecting the shafts of the motor and vibrators intandem so that all so connected shafts will rotate in angular unison.

[Qfl'ic'ial Gazette Febmary 4, 1.936.]

